Bronchial asthma, although common, currently has no specific treatment. The primary aim of medication is to control symptoms. There are two main types of medications used to treat asthma: one type is known as bronchodilators, commonly including receptor agonists, anticholinergics, and theophylline. The other type is anti-inflammatory drugs, commonly including corticosteroids, leukotriene modifiers, sodium cromoglycate, nedocromil sodium, and ketotifen. (Medications should be used under the guidance of a doctor, according to specific circumstances.)